島尻マージにおける乾燥密度が水分特性曲線及び飽和透水係数に与える影響及びPTFsの適用性の検討

抄録

  Many models to assess the impact of agricultural activities for the environment have been developed recently. And the accurate soil characteristics are important in applying these models. However, measuring the all soil characteristics costs and takes long time and is not efficient. Therefore, many models have pedotransfer functions (PTFs). It was confirmed that the performance of the PTFs depends strongly on the data that has been used for the development of the PTFs. So, in this study, we examined influences of the bulk density for the retention curve and the hydraulic conductivity of Shimajiri maji soil at first, and applied the PTFs (ROSETTA) to evaluate the practicality. As a result, it was confirmed that there were some errors in applying the ROSETTA to estimate the retention curve of the Shimajiri maji soil.